Into a cup pour out the rhubarb syrup, then the lime juice.
Add the ice, and top up with the gingerbeer.
Add the lime slices and the mint.
Notes
To make this a mocktail, use a brewed gingerbeer like bunderberg.Or add a slice or 2 of fresh ginger and top up with lemonade or soda water.To make a jug simply triple the recipe.In case you missed the links the rhubarb syrup recipe can be found here